java在将inOrderTraversal方法的内容放入文件时遇到问题
我一直在尝试获取它,以便该方法返回一个字符串,但它会抛出一系列错误。我需要将inOrderTraversal方法的内容获取到一个文件中,或者以某种方式存储它,以便将其写入一个文件。如果有人能帮我,我会非常感激的!谢谢
public class BinaryTree {
// Tree: simplest possible binary search tree
private Node root; // hidden root node
// inorderTraversal: need because root is hidden
public void inorderTraversal() {
inorderT(root);
}
// inorderT: recursive function that does the work
private void inorderT(Node node) {
if (node != null) {
inorderT(node.left);
System.out.println(node.data+" ");
//node.data = node.data+" ";
inorderT(node.right);
}
}
========================================================================================================
public static void main(String ... args) throws IOException {
System.out.println("Starting");
File file = new File("C:\\Users\\Marlene\\Workspace\\BinaryTree\\src\\com\\company\\unsorteddict.txt");
Scanner scan = new Scanner(file);
//Creation of linked list and line variable
String fileContents = "";
LinkedList<String> linkedList = new LinkedList<>();
BinaryTree tree = new BinaryTree();
int lineNum = 0;
//Writing contents into a file
PrintWriter writer = new PrintWriter("C:\\Users\\Marlene\\Workspace\\BinaryTree\\src\\com\\company\\sorteddict.txt", "UTF-8");
while(scan.hasNextLine()){
fileContents = scan.nextLine();
lineNum++;
int x = 0;
if (linkedList.size() == 0) {
linkedList.add(0, fileContents);
}
else {
for (int i = 0; i < linkedList.size(); i++) {
tree.insert(fileContents);
}
}
}
tree.inorderTraversal(); //NEED TO PUT THIS LINE INTO A FILE
System.out.println("Ended");
}
# 1 楼答案
您可以将
writer
对象传递给inorderTraversal()
方法&;还可以使用inorderT()
方法并按顺序将遍历节点数据写入文件